Antonyms for the phrase "lounges around" include words such as "active," "energetic," and "productive." In contrast to lounging around, being active implies staying busy, engaging in physical or mental activity, and keeping oneself occupied throughout the day. Similarly, showing energetic behavior is equated with being lively, vivacious or athletic in nature. Being productive, on the other hand, means being industrious, efficient, or purposeful in one's work. Overall, these antonyms highlight the importance of leading an active lifestyle and maintaining a high level of productivity, rather than spending too much time lounging around, engaging in leisure activities.